I don't know how you hear music. I imagine that if you like music at all then it has, in your head, some kind of third dimension to it, a dimension suggesting space as well as surface, depth of field as well as texture. Speaking for myself, I used to hear "buildings"... three-dimensional forms of architectural substance and tension. I did not "see" these buildings in the classic synaesthetic way so much as sense them. These forms had "floors", "walls", "roofs", "windows", "cellars". They expressed volume. Music to me has always been a handsome three-dimensional container, a vessel, as real in its way as a Scout hut or a cathedral or a ship, with an inside and an outside and subdivided internal spaces. I'm absolutely certain that this "architecture" had everything to do with why music has always exerted such a hold over me. I think music was the structure in which I learned to contain and then examine emotion.